* {
  margin: 0;
  padding: 0;
}
#box {
  width: 300px;
  position: relative;
}
#scrollBar {
  margin-top: 15px;
  width: 300px;
  height: 20px;
  background-color: #ccc;
  border-radius: 20px;
}
#radius {
  width: 30px;
  height: 30px;
  position: absolute;
  top: 30px;
  left: 20%;
  border-radius: 100%;
  border: 2px solid rgb(88, 133, 231);
  background-color: #fff;
  transition: all 0.3s;
  box-sizing: border-box;
}
#shadow {
  position: absolute;
  width: 30%;
  height: 20px;
  background-color: rgb(88, 133, 231);
  border-radius: 20px;
  top: 36px;
  transition: all 0.3s;
}
